It looks like to me you're slowing down still in the last step and plant, almost like you're thinking about it too much, which is probably true since its new. Few ways to combat this...one, keep going and trying to increase speed as it feels more natural (which to me only screams problems/injury) or try Toddays approach that worked/is working for LBSS. Start off at one step into your plant and drill that til it becomes second nature, then add another step. I think this would be a smarter, safer way as it allows your body to adjust accordingly and limits possible injury (imo) from doing something unnatural at high speed

Since I know Raptor will see this I'll equate it to a car...

When I go out on a new setup to the drag strip I dont go for broke the first pass (or second, third, etc). First passes are usually with the power turned down just to see how the car reacts, on the launch with suspension, traction, tires, down the track with the gearbox, chassis and alignment and brakes, etc. This allows me to fine tune the car without risking a potential large mishap due to something simple that became big when we started leaning on it.